no you don't want to buy the 700-M
I had one, and it was cool, and nice and easy to install. But for the sake of anything i couldn't get the touchscreen to stay calibrated for longer than 10-20 minutes. I recommend you get the xenarc 700 tsv. I had my personal success with that unit. It's the best you can get. And it's also close to the same price.
Now if you still want to get the 700-m, search ebay for the SP-716 same unit, just much cheaper